Question

A metal M reacts with sodium hydroxide to give a white precipitate X which is soluble in excess of NaOH to give Y. Compound X is soluble in HCI to form a compound Z. Identify M.X,Y and Z
M , X , Y, Z
A. `Si, SiO_(2), Na_(2)siO_(3), SiCI_(4)`
B. `AI, AiI(OH)_(3), NaMgO_(3), AICI_(3)`
C. `Mg, Mg(Oh)_(3), NaMgO_(3), MgCI_(2)`
D. `Ca, Ca(OH)_(2) , Na_(2) CO_(3), NaHCO_(3)`

Answer 1

Correct Answer - B
`underset((M))(2AI) + 2NaOH + 6H_(2)O to underset((X))(2AI(OH)_(3)) underset(NaOH)overset("Excess of")(to) underset((Y))(NaAIO_(2))`
`underset((X))(2AI(OH)_(3)) 6HCI to underset((Z))(2AICI_(3)) + 6H_(2) O`